meat vs au jus

meat is a noun but au jus is not a noun.

Word	Noun	Adjective	Verb	Adverb
meat	Yes	No	No	No
au jus	No	Yes	No	No

meat (noun)	au jus (noun)
the choicest or most essential or most vital part of some idea or experience
the flesh of animals (including fishes and birds and snails) used as food
the inner and usually edible part of a seed or grain or nut or fruit stone

meat (adjective)	au jus (adjective)
	served in its natural juices or gravy